471: Mainline

Now suppose that your data contains an unknown car-type number. If you like, you can handle such unknown car-type numbers using the default part of the switch statement. In the following example, you choose to have unknown railroad-car–type numbers displayed on your screen:

switch (type_code) { 
  case 0: train[n] = new engine;   break; 
  case 1: train[n] = new box_car;  break; 
  case 2: train[n] = new tank_car; break; 
  case 3: train[n] = new caboose;  break; 
  default: cout << "Car-type number " << type_code 
                << " is unknown!" << endl; 
}